Event: League Division 2

Opponent Rating Result
Jon Jordan 1620 1 - 0
Peter F Mason 1830 ½ - ½
Angelica Rowe 1531 1 - 0
Robert Dennington 1567 1 - 0
James A Sidley 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1630 = (6548 + 400 * (4 - 0)) / 5)

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